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BaseRepresentation
bin100111001100000011001
32102020111001
410321200121
5312042441
643305001
713625536
oct4714031
92366431
101284121
117a7863
1251b161
1335c647
14255d8d
151a5731
hex139819

1284121 has 4 divisors (see below), whose sum is σ = 1286500. Its totient is φ = 1281744.

The previous prime is 1284083. The next prime is 1284131. The reversal of 1284121 is 1214821.

Adding to 1284121 its reverse (1214821), we get a palindrome (2498942).

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1214821 = 3732833.

It can be written as a sum of positive squares in 2 ways, for example, as 585225 + 698896 = 765^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284121 - 217 = 1153049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1284131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (321625).

It is a 540-hyperperfect number.

21284121 is an apocalyptic number.

It is an amenable number.

1284121 is a deficient number, since it is larger than the sum of its proper divisors (2379).

1284121 is an equidigital number, since it uses as much as digits as its factorization.

1284121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378.

The product of its digits is 128, while the sum is 19.

The square root of 1284121 is about 1133.1906282705. The cubic root of 1284121 is about 108.6931018694.

The spelling of 1284121 in words is "one million, two hundred eighty-four thousand, one hundred twenty-one".

Divisors: 1 829 1549 1284121